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Special Minister of State Scott Ryan is working on an overhaul of entitlements, following an independent review.

The review was triggered by revelations the former Speaker of parliament Mrs Bishop billed taxpayers $5000 for a chartered luxury helicopter flight between Melbourne and Geelong - a 90-minute car trip - to attend a Liberal party fundraiser.

Greens democracy spokesperson Senator Lee Rhiannon said the rules needed a major overhaul.

"The place to start is to reverse the Howard government's change to the rules that allows MPs to roll over their money which means they can squirrel away money for the next election," she told AAP.

"These are more than the perks of office. For an MP to spend thousands of dollars of public money on charter aircraft in an election campaign risks the perception of corruption."

Labor senator Deb O'Neill, who has used charter aircraft, said there were situations where it was a legitimate use of taxpayers' money.

"You need to take parliament to the people," she said.

Senator Rhiannon said the system did not meet the commonsense test.

"The ease with which federal MPs can use their many allowances to fund their own re-election is a scandal that adds to the public's cynicism about political parties and individual MPs," she said.

The MP allowance system permits sitting federal MPs to use their travel, printing and general resource allocations for re-election, giving them an advantage over other candidates.

Other notable expenses include deputy Labor leader Tanya Plibersek spending $233,000 on her office facilities, which includes rent, power, security and office equipment.